Use more concise AssertJ assertions.

src/test/java/se/citerus/dddsample/domain/model/cargo/DeliveryTest.java

@@ -27,10 +27,7 @@ public class DeliveryTest extends TestCase {
 
     List<HandlingEvent> orderEvents = dh.history();
     assertThat(orderEvents).hasSize(4);
-    assertThat(orderEvents.get(0)).isSameAs(he2);
-    assertThat(orderEvents.get(1)).isSameAs(he4);
-    assertThat(orderEvents.get(2)).isSameAs(he1);
-    assertThat(orderEvents.get(3)).isSameAs(he3);
+    assertThat(orderEvents).containsExactly(he2, he4, he1, he3);
   }
 
   public void testCargoStatusFromLastHandlingEvent() {

src/test/java/se/citerus/dddsample/domain/model/handling/HandlingEventTest.java

@@ -88,7 +88,7 @@ public class HandlingEventTest extends TestCase {
   public void testParseTypeIllegal() throws Exception {
     try {
       valueOf("NOT_A_HANDLING_EVENT_TYPE");
-      assertThat(false).as("Expected IllegaArgumentException to be thrown").isTrue();
+      fail("Expected IllegaArgumentException to be thrown");
     } catch (IllegalArgumentException e) {
       // All's well
     }